Pipe-wrench



A. W..K IEFER.

PIPE WRENCH. APPLICATION FILED JAN. 5. I920.

' 13353346, PatentedSept. 21,1920.

MQ PrQ.

ATTORNEYS UNITE STAT rammm.

ARTHUR WELLINGTON. KIEFER, OF CHICAGO, ILLINTOIS;

PIPE-WRENCH.

To all whom it may concern:

Be it known that I, ARTHUR V. KIEFER,

a citizen of the United States, and a resident of Chicago, in the county of Cook and State firmly when a positive turning force is applied.

A further-object of myinvention is to provide a wrench which can be manufac tured cheaply, which will not get out of order easily, and in which any worn or broken parts may be readily replaced at small cost.

Other objects and advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustratedin the accompanying drawings, forming part of this application, in which Figure 1 is a side view of my device,

Fig. 2 is a bottom viewof the same,

Fig. 3 is a sectional view along theline 3-3 of Fig. 2, V

' Fig. 4 is a perspective view of a part of the device.

In carrying out my invention, I provide a handle portion A, having a laterallyextending end portion A which forms afixed jaw member of the wrench. The jaw memher A has serrated projections A on its face, and has the front side of the lateral projection provided with teeth A A movable jaw member B has an integral longitudinal shank B which is held in substantially parallel spaced relation to the handle portion A. by guiding and retaining members C and D. The movable jaw member B has serrations B corresponding to the serrations, A uponthe fixed jaw member A so that a pipe or other object may Specification of Letters Patent. Patented" Sept zl, 1920. Application filed January 5, 1920. Serial No. 349,366.

be gripped firmly between the two members A and B. The shank B 'is pro vided with teeth B which normally engage the opposed teeth A upon-the front side of the'laterally extending jaw member A The member C is pivotally fastened at C to the handle A. An integral partition C divides the guiding and retaining member G into two compartments C and C The shank B is slidably disposed within the compartment 0 The handle A isdisposedwithin the compartment 0* in such a mannerthat ordinarily a space remains between the' handle A and the'partition C the han-j dle being maintained in this position by a flat spring E, which has one end fastened presses against the partition C The U-shaped member D has an upper:

thereof may be readily understood. A gripping pressureupon the ends of the shank B and the handle A pushes the member downwardly against the spring E. vThe partition C approaches the handle A, the meshed teeth A and B are moved outof engagement, and the teeth D no longer engage the teeth 13*, since theportion B has been rotated about C as a center. shank B is now freely slidable through the may be gripped. When the gripping pres sure is released, action of the spring pgushes the member C upwardly, the teeth engage the teeth D the teeth 13 engage The guiding compartment C and the jaw memher B may be instantly adjusted with relation to the jaw member A by a movement of the thumb so that objects of varying size A and B. Since the force exerted bears upon the fixed jaw memberA- and against the end of-the handle A instead of against 70] 1 at E to the handle A, while the other end the movable members, my device cannot be broken or rendered inoperative under ordinary working conditions.

The facility with which my devic'e'may be operated forms one of the main features of the invention. The'jaws of the device may be adjusted instantly and positively T said shank, a second guiding and retaining member pivotally connected to said handle member, sald shank having teeth on the 0pposite side of the shanlrfrom the teeth which engage the teeth on the handlemember, and teeth carried by. said second named retaining member and arranged to engage the last mentioned teeth on said shank. V j

2. A pipe wrench comprising a handle portion having teeth at one end and constituting a jaw Vmember, an opposing jaw member having a shank provided with teeth arranged to engage certain teeth on the handle member, a guiding and retaining member pivotal'ly connected to said handle member and arranged to slidably receive said shank, a second guiding and retaining member pivotally connected tosaid handle mem ber, said shank having teeth on the opposite side of the shank from the teeth which en- 7 gage the teeth onrthe handle member, teeth carried by said second named retaining member and arranged to engage the last mentioned teeth on said shank, and a spring 7 secured to. said handle member andarranged to bear on said first named guiding and retaining member.

3. A pipe wrench comprising a handle portion having teeth at one end and constituting a aw member, a second aw member having a shank provided with teeth on one side arranged to engage certain teeth on the handle and teeth on the opposite side of the shank, a guiding and retaining member pivotally connected with said handle and arranged to slidably receive said shank, said guiding and retaining member having an opening, and a U-shap'e d guiding and retaining member pivotally connected with said handle and having a portion arranged to extend into the opening in said first named guiding and retaining member, and provided with teeth arranged to engage the last named teeth on the shank.

a. A pipe wrench comprising a handle portion having teeth at one end and constituting a jaw member, a second jaw member having a shank provided with teeth on one side arranged to engage certain teeth on the handle and teeth on the opposite side of the shank, a guidingiand retaining member pivotally connected with said handleand arranged to slidably receive said shank, said guiding and retaining member having an opening, a U-shaped guiding and retaining member pivotally connected with said handle and having a portion arranged to extend into the opening in said first named guiding and'retaining member, and provided with teeth arranged to engage the last named teeth on the shank, and a spring carried by said handle member and arranged to bear on a portion of said first named guiding and retaining member.

ARTHUR WELLINGTON KIEFER, 

